Internal-combustion engine



E. A. FIELD AND E A HELD JR.

FNTERNAL COMBUSTION ENGINE. I [\PPUCATHIN :iLED JUNE 21. 19:20. 7 1,372,343. Patented Man 22, 1921.

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E. AJFIELD AND E. A. FIELD, JR. INTERNAL COMBUSTION ENGINE- APPLIICATION FILED JUNEZI, 1920. 1,372,343. Patented Mar. 22, 1921.

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auwmtozb [dward /7. field E. A. FIELD AND E. A. FIELD, JR.

INTERNAL COMBUSTION ENGINE. APPLICATION FILED JUNE 21-, 1920.

1,372,343. V Patented Mar. 22, 1921.

3 SHEETS-SHEET 3.

{Hum/Mow .ETEIJIL UNITED STATES PATENT OFFICE.

A. FIELD AND EDWARD A. FIELD, 31%.,01 OAK PARK, ILLINOIS,

INTERNAL-COMBUSTION ENGINE.

Specification of Letters Patent.

Patented Mar. 22, 1921.

Application filed June 21, 1920. Serial No. 890,611.

type which is of high efliciency.

Second, to provide in an internal oombustion engine of the high compression type an improved charging or fuel feeding means.

Third, to provide an improved internal combustion engine in which the quantity of fuel delivered is controlled by an air control means.

Further objects and objects. relating to structural details will definitely appear from the detailed description to follow.

We accomplish the objects of our invention by the devices and means described in the following specification. The invention is clearly defined and pointed out in the claims.

A' structure which is a preferred embodiment of our invention is clearly illustrated in the accompanying drawing forming a part of this specification in which:

' Fi re I is a plan view of a structure embodylng the features of our invention.

Fig. II is a side elevation thereof.

Fig. III is a detail longitudinal section on a line corresponding to line 3-3 of Figs. I and IV.

Fig. IV is a transverse section on a line corresponding to line 4-4 of Figs. I,

and III.

In the drawing similar reference characters refer to similar parts throughout the several views, and the sectional views vare taken looking in the direction of the little arrows at the ends of the section lines.

Referring to the drawing, 1 represents a cyllnder, 2 the head thereof and 3 the piston of our lmproved internal combustion englue. The cylinder head is provided with a compression or combustion chamber 4; and

is also provided with an air inlet valve 5,

and an exhaust valve 6. The exhaust valve s controlled by the rocker 7 actuated by a push rod 8. The cylinder air inlet valve 5 is controlled by the rocker member 9 actuated by the push rod 10. The means foractuating the push rods 8 and 10 are not illustrated. Various parts are shown in conventional form.

The push rod 10 -is actuated to open the valve 5 on the suction stroke of the piston 3. The cyllnder head is provided with a bore 11 in which is a tubular member 12 extendmg through the chamber i and provided with an opening 13 therein, also with an opening 14 within this chamber 4. A body merhberlfi is inserted in one end of the bore 11 to project into this member- 12 and is provided with a fuel passage 16 communicating with the fuel .feed,reservoir 17 The passage 16 has a nozzle .1"& delivering to the charging chamber 19 within the charging chamber member 20. I

This charging chamber member 20 is retatably mounted within the tubular member 12 so that more or less of its ports 21 may be brought into register with the opening 13 therein, thereby varying the delivery opening between the charglng chamber 19 and the cylinder chamber 4. The member 15 is also provided'with an exhaust passage 22 for the charging chamber, the exhaust passage registering with the hole 14: injthei member 12see Fig. III.

The charging chamber member 20 is provided with a tubular stem portion 23lhaving a handle 24 therein for its adjustment. A packing comprising a packing gland 25 is provided for this stem portion. T'hetubuar stem 23 provides an air inlet passage for the charging chamber, the passage bein controlled by the valve 26 having a stem 2 disposed longitudinally through the tubular stem 23. p

A coiled spring 28 is connected to the stem 27, the other end of the spring being connected'to the lever 29 pivoted at 30 and connected by the link 31 to an arm 32 on the governor controlled rod 33. The governor connections or control means for this rod are not illustrated as they form no part of our present invention.

It will be understood that the purpose of the governor is to regulate the tension of the spring and thereby vary the amount of air passing the valve 26 tovary the degree of vacuum Within the charging chamber, and thereby control the amount of fuel drawn into the charging chamber.

The exhaust passage 22 is controlled by the valve 41 the stem 42 of which projects to be engaged by an arm 43 on the rock shaft 44. The rock shaft 4% is provided with a second arm. 45 coactin with a t-appet 16 on the push rod 10 sothat the valve 11 is opened when the air inlet valve 5 is opened. The val e actuating push rod is timed so that the valves 5 and ll are opened on the suction stroke of the piston. However, the capacity of the valve 5 is such that a vacuum is produced in the chamber 4 and through the connection to the charging chamber, a vacuum is also produced in the charging chamber. This draws the fuel through the nozzle 18 into the charging chamber, the quantity of fuel delivered being governed by the degree of vacuum and this is governed by the air inlet valve 26 which is regulated by the tension of the governor control spring 28, as described.

()n the compression stroke of the piston the air is highly compressed within the cylinder and within the charging chamber and is ignited within the charging chamber. A portion of the fuel is burned within the charging chamber increasing the pressure therein and driving or ejecting the fuel now thoroughly vaporized into the cylinder through the ports 21 where the remainder of the fuel mixing with the air therein burns.

The adjustment of the member 20 controls the ports 21 varying the timing of the explosions and allowing speed variation without pre-ignition when running slowly.

At the end of the work stroke the exhaust valve 6 is opened so that the exhaust gases are forced out of the cylinder. This exhaust stroke is followed by the suction stroke during which time the valve 41 is opened as stated so that the charging chamber is thoroughly scavenged, particularly because of the fact of air being admitted through the valve 26 during this stroke.

By this arrangement, we dispense with a fuel pump, the amount of fuel delivered at each charge is regulated by air instead of by fuel valves, the fuel is drawn up by suction thereby obviat'mg the necessity for gravity flow which might flood the engine when idle, and the fuel is effectively vaporized.

\Ve have illustrated and described our improvements in only one embodiment as we believe that that will enable those skilled in the art to which my invention relates to embody or adapt the same as may be desired.

Having thus described our invention, what we claim as new and desire to secure by Letters Patent is:

1. In an internal combustion engine, the combination with a cylinder, an air inlet valve and an exhaust valve therefor. of a rotatably mounted charging chamber mcm her having a peripherally disposed series of cylinder communicating ports so that the portage may be varied by the rotation of said charging chamber member, an exhaust passage connecting said charging chamber to said cylinder, a valve for said exhaust passage, a fuel connection to said charging chamber, means for opening said cylinder air inlet and said exhaust passage valves on the suction stroke of the engine. the capacity of the cylinder inlet valve being such that a vacuum is produced within the charging chamber and a charge of fuel is drawn into said charging chamber, an air inlet valve for said charging chamber, a seating spring therefor, and means for varying the tension of said spring so that the degree of vacuum in said charging chamber is varied to regulate the fuel charge.

2. In an internal combustion engine, the combination with a cylinder, an air inlet valve and an exhaust valve therefor, of a rotatably mounted charging chamber member having a peripherally disposed series of cylinder communicating ports so that the portage may be varied by the rotation of said charging chamber member, an exhaust passage connecting said charging chamber to said cylinder, a valve for said exhaust passage, a fuel connection to said charging chamber, means for opening said cylinder air inlet and said exhaust passage valves on the suction stroke of the engine, the capacity of the cylinder inlet valve being such that a vacuum is produced within the charging chamber and a charge of fuel is drawn into said charging chamber, and an air inlet valve for said charging chamber.

3. In an internal combustion engine, the combination with acylinder, an air inlet valve and an exhaust valve therefor, of a charging chamber communicating with said cylinder, an exhaust passage connecting said charging chamber to said cylinder, a valve for said exhaust passage, a fuel connection to said charging chamber, means for opening said exhaust passage valve on the suction stroke of the engine, the capacity of the cylinder inlet valve being such that a. vacuum is produced within the charging chamber and a char e of fuel is drawn into said charging cham r, an air inlet valve for said charging chamber, a seating spring therefor, and means for varying the tension of said spring so that the degree of vacuum in said charging chamber is varied to regulate the fuel charge.

4. In an internal combustion engine, the

combination with a cylinder, an air inlet valve and an exhaust valve therefor, of a charging chamber communicating with said cylinder, an exhaust passage connecting said charging chamber to said cylinder, a valve for said exhaust passage, a fuel connection to said charging chamber, means for opening said exhaust passage valve on the suction stroke of the engine, the capacity of the cylinder inlet valve being such that a vacuum is produced within the charging chamber and a charge of fuel is'drawn into said charging chamber, and an air inlet valve for said charging chamber.

5. In an internal combustion engine, the combination of a cylinder, an air inlet valve therefor, a charging chamber connected to deliver to said cylinder, means for varying said delivery connection, an exhaust valve connecting said charging chamber to said cylinder, a fuel feed connection to said charging chamber, means for opening said cylinder air inlet and exhaust valves on the suction stroke of the engine whereby a vacuum is produced within said charging chamber and a charge of fuel is drawn into said charging chamber, a seating spring therefor, and means for varying the tension of said spring thereby controlling the degree of vacuum produced in said charging chamber to regulate the fuel charge.

6. In an internal combustion engine, the combination of a cylinder, an air inlet valve therefor, a charging chamber connected to deliver to said cylinder, an exhaust valve connecting said charging chamber to said cylinder," a fuel feed connection to said charging chamber, means for opening said cylinder air inlet and exhaust valves on the suction stroke of the engine whereby a vacuum is produced within said chargingchamber and a charge of fuel is drawn into said charging chamber, an air inlet valve for combination of a cylinder, an air inlet valve therefor, a charging chamber connected to deliver to said cylinder, means for varying -said delivery connection, an exhaust valve connecting said charging chamber to said cylinder, a fuel feed connection to said 0 arging chamber, means for opening said cylinder air inlet and exhaust valves on the suction stroke of the engine whereby a vacuum is produced Within said charging chamber and a charge of fuel is drawn into said charging chamber, and an air inlet valve for said vcharging chamber.

8. In an internal combustion engine, the combination of a cylinder, a charging chamber connected to said cylinder by restricted and variable charge delivery openings and an. exhaust connection, a fuel feed connecamount of vacuum produced in said charging chamber is regulated for the purpose specified.

9. In an internal combustion engine, the

combination of a cylinder, a charging chamber havinga delivery connection and an exhaust connection to said cylinder, a fuel feed connection for said charging chamber, means for opening said exha ust connection to said cylinder on the suction stroke of the engine whereby a vacuum is produced within the charging chamber to draw a charge of fuel into the same, anair inlet valve for saidcharging chamber, and means for controlling said air inlet valve, all coacting for the purpose specified.

10. In an internal combustion engine, the combination of a cylinder, a charging cha1nher having a delivery connection and an exhaust connection to said cylinder, a fuel feed connection for said charging chamber, and means for opening said exhaust connection to said cylinder on the suction stroke of the engine whereby a .vacuum is produced Within the charging chamber to draw a charge of fuel into the same, all coacting for the purpose specified.

11. In an internal combustion engine, the combination of a cylinder, a charging chamber connected to deliver to said cylinder and so that on the suction stroke of the engine a vacuum is produced in said chamber, a fuel feed connection for said charging chamber whereby a charge of fuel is drawn into the same by the vacuum therein an air inlet connection for said charging chamber, means for controlling said air inlet. connection and thereby varying the degree of vacuum produced in said chamber by the suction stroke of the engine, and means for varying the delivery connection for said charging chamber and cylinder.

12. In an internal combustion engine, the

combination of a cylinder, a charging chamber connected to deliver to said cylinder and so that on-the suction stroke of the engine a vacuum is produced in said chamber, a fuel feed connection for said charging chamber whereby a charge of fuel is drawn vinto the same bythe vacuum therein, an air inlet. connection for said charging chamber,

and means for controlling said air inlet con- 10 nection and thereby varying the degree of vacuum produced in said chamber by the suction stroke of the engine.

I witness whereof we have hereunto set our hands and seals in the presence of two witnesses.

EDWARD A. FIELD. [n.s]

EDlVARD A. FIELD, Jn. [11.3.] Witnesses:

JAcon COHELIN,

GUY E. VILLIAMS. 

